1. You need to know the requirements of your analytical instrument
2. Find a supplier
3. It is best to ask them to provide some users
< p>4. Understand and sell reduced potassium permanganate substance services through users5. Let manufacturers provide analytical instrument parameters and related information (company profile, etc.) at the same time
6. Contact more Compare several manufacturers
7. It is best to find an expert to refer to you
8. Summarize and report the final results
9. Confirm the supplier again , lower the price a little more
10. Make a purchase